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For new customers working together for the first time, we may charge a sample fee, which is refundable or creditable for subsequent bulk orders.

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Oxidative stress biomarkers (8-isoprostane) decreased by 35%

The Bottom Line GHK-Cu is a naturally occurring copper tripeptide that stimulates collagen synthesis at picomolar concentrations, modulates over 4,000 genes, and has shown measurable wrinkle reduction and collagen improvement in clinical studies

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Y., Tian, Y., Wang, H., & Yang, X